DTIC AD0091337: TANDEM HELICOPTER STABILITY PROGRAM

UNCLASSIFIED

AD NUMBER

AD091337

NEW LIMITATION CHANGE
TO

Approved for public release, distribution
unlimited

FROM

Distribution authorized to U.S. Gov't,
agencies and their contractors;
Administrative/Operational Use; APR 1956.
Other requests shall be referred to Office
of Naval Research, One Liberty Center, 875
North Randolph Street, Arlington, VA
22203-1995.

AUTHORITY

onr ltr, 26 oct 1977

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DOCUMENT SERVICE CENTER

KNOTT BUILDIN6, DAYTON, 2, OHIO

This document is the property of the United States Government. It is furnished for the du¬
ration of the contract and shall be returned when no longer required, or upon recall by ASTIA
to the following address: Armed Services Technical Information Agency,
Document Service Center, Knott Building, Dayton 2, Ohio.

NOTICE: WHEN GOVERNMENT OR CITHER DRAWINGS, SPECIFICATIONS OR OTHER DATA
ARE USED FOR ANY PURPOSE OTHER THAN IN CONNECTION WITH A DEFINITELY RELATED
GOVERNMENT PROCUREMENT OPERATION, THE U. S. GOVERNMENT THEREBY INCURS
NO RESPONSIBILITY, NOR ANY OBLIGATION WHATSOEVER; AND THE FACT THAT THE
GOVERNMENT MAY HAVE FORMULATED, FURNISHED, OR IN ANY WAY SUPPLIED THE
SAID DRAWINGS, SPECIFICATIONS, OR OTHER DATA IS NOT TO BE REGARDED BY
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UNCLASSIFIED

PRINCETON UNIVERSITY
PRINCETON, NEW JERSEY

SCHOOL OF ENGINEERING, JOHN C. GREEN FOUNDATION

EPARiy |Njr of Aeronautical Engineering
he James iForrestal Research Center

Qoo

Commanding Officer
Office of Naval Research
Air Branch/Code 46l
Department of the Navy
Washington 25, D. C.

FC

April 4, 1956

Subject: Tandem Helicopter Stability Program, Status Report for the
month of March, 1956.

Contract N6 onr-27024

Flight Test Operations:

Despite unusually poor flying conditions during the month of March,
several lateral static stability data flights were accomplished and the
results are under analysis.

A report entitled, "Instrumentation of a Tandem Helicopter for Static
and Dynamic Stability and Control Flight Tests", has been completed and is
now being printed. Distribution is expected shortly.

Theoretical Analysis:

Studies have been continued of the variation of the stability deriva¬
tives with speed. These are being compared with preliminary flight results.
Analog computer studies of dynamic response based on the theoretical deriva¬
tives are continuing. Preliminary results indicate that considerable simpli¬
fication of the complete equations on motion is permissible over most of the
speed range.

Very truly yours,

LEONARD GOLAND
Chief Project Engineer

LG/nt

cc: 3 - Commanding Officer, ONR, Wash.

1 - Commander C. W. Meshier
1 - J. Levy, ONR, N. Y.

1 - Special Devices Center - Code 910
1 - R. Booth, DE 31, BuAer
8 - Office Chief of Trans. Dept, of the Army
1 - Asst. Chief of Staff, G-4, R & D
1 - Commanding General, Fort Monroe, Virginia ATDEV-6
1 - David Teylor Model Basin, Maryland - Code 634
1 - President, Board No. 6, CQNARC, Camp Rucker, Alabama
1 - Armed Service - Technical Inform. Agent, Dayton, Ohio

Reproduced by

DOCUMENT SERVICE CENTER

(•ITT IllltiaC. DITTO*, 2. DUO

document la the property of the United States Government. It is furnished for the du¬
ration of the contract and shall be returned when no longer required, or upon recall by ASTIA
to the following address: Armed Services Technical Information Agency.
Document Service Center, Knott Building, Dayton i, Ohio.

rcgpCE: WHEN GOVERNMENT OR OTHER DRAWINGS, SPECIFICATIONS OR OTHER DATA
UfED FOR ANY PURPOSE OTHER THAN Of CONNECTION WITH A DEFINITELY RELATED
PROCURBMENT OPERATION, THE U. S. GOVERNMENT THEREBY INCURS
^™J?2!5?ILrrY» N0R ANY OBLIGATION WHATSOEVER; AND THE FACT THAT THE

WMtMULATED, FURNISHED, OR IN ANY WAY SUPPLIED THE
SraCIFICATIONS, OR OTHER DATA IS NOT TO BE: REGARDED BY
2^AHPt?«rHBWII“ ** W ANY MANNER LICENSING THfc HOLDER OR ANY OTHER
TTQwSrJi1? CORPORATION, OR CONVEYING ANY RIOTTS OR PERMISSION TO MANUFACTURE,

USE OR SELL ANY PATENTED INVENTION THAT MAY IN ANY WAY BE RELATED THERETO.

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